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freebsd-dev/release/sysinstall/tcpip.c
Jordan K. Hubbard 7bd659ebaf Only do dhclient once; it has its own internal retry which is more than 
long enough (and doing it multiple times results in a dialog which waits
AGES to complete).
1999-09-06 15:06:17 +00:00

486 lines
14 KiB
C
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/*
* $FreeBSD$
*
* Copyright (c) 1995
* Gary J Palmer. All rights reserved.
* Copyright (c) 1996
* Jordan K. Hubbard. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* verbatim and that no modifications are made prior to this
* point in the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* All kinds of hacking also performed by jkh on this code. Don't
* blame Gary for every bogosity you see here.. :-)
*
* -jkh
*/
#include "sysinstall.h"
#include <sys/param.h>
#include <netdb.h>
/* The help file for the TCP/IP setup screen */
#define TCP_HELPFILE "tcp"
/* These are nasty, but they make the layout structure a lot easier ... */
static char hostname[HOSTNAME_FIELD_LEN], domainname[HOSTNAME_FIELD_LEN],
gateway[IPADDR_FIELD_LEN], nameserver[IPADDR_FIELD_LEN];
static int okbutton, cancelbutton;
static char ipaddr[IPADDR_FIELD_LEN], netmask[IPADDR_FIELD_LEN], extras[EXTRAS_FIELD_LEN];
/* What the screen size is meant to be */
#define TCP_DIALOG_Y 0
#define TCP_DIALOG_X 8
#define TCP_DIALOG_WIDTH COLS - 16
#define TCP_DIALOG_HEIGHT LINES - 2
static Layout layout[] = {
#define LAYOUT_HOSTNAME 0
{ 1, 2, 25, HOSTNAME_FIELD_LEN - 1,
"Host:", "Your fully-qualified hostname, e.g. foo.bar.com",
hostname, STRINGOBJ, NULL },
#define LAYOUT_DOMAINNAME 1
{ 1, 35, 20, HOSTNAME_FIELD_LEN - 1,
"Domain:",
"The name of the domain that your machine is in, e.g. bar.com",
domainname, STRINGOBJ, NULL },
#define LAYOUT_GATEWAY 2
{ 5, 2, 18, IPADDR_FIELD_LEN - 1,
"Gateway:",
"IP address of host forwarding packets to non-local destinations",
gateway, STRINGOBJ, NULL },
#define LAYOUT_NAMESERVER 3
{ 5, 35, 18, IPADDR_FIELD_LEN - 1,
"Name server:", "IP address of your local DNS server",
nameserver, STRINGOBJ, NULL },
#define LAYOUT_IPADDR 4
{ 10, 10, 18, IPADDR_FIELD_LEN - 1,
"IP Address:",
"The IP address to be used for this interface",
ipaddr, STRINGOBJ, NULL },
#define LAYOUT_NETMASK 5
{ 10, 35, 18, IPADDR_FIELD_LEN - 1,
"Netmask:",
"The netmask for this interface, e.g. 0xffffff00 for a class C network",
netmask, STRINGOBJ, NULL },
#define LAYOUT_EXTRAS 6
{ 14, 10, 37, HOSTNAME_FIELD_LEN - 1,
"Extra options to ifconfig:",
"Any interface-specific options to ifconfig you would like to add",
extras, STRINGOBJ, NULL },
#define LAYOUT_OKBUTTON 7
{ 19, 15, 0, 0,
"OK", "Select this if you are happy with these settings",
&okbutton, BUTTONOBJ, NULL },
#define LAYOUT_CANCELBUTTON 8
{ 19, 35, 0, 0,
"CANCEL", "Select this if you wish to cancel this screen",
&cancelbutton, BUTTONOBJ, NULL },
{ NULL },
};
#define _validByte(b) ((b) >= 0 && (b) <= 255)
/* whine */
static void
feepout(char *msg)
{
beep();
msgConfirm(msg);
}
/* Very basic IP address integrity check - could be drastically improved */
static int
verifyIP(char *ip)
{
int a, b, c, d;
if (ip && sscanf(ip, "%d.%d.%d.%d", &a, &b, &c, &d) == 4 &&
_validByte(a) && _validByte(b) && _validByte(c) &&
_validByte(d) && (d != 255))
return 1;
else
return 0;
}
/* Check for the settings on the screen - the per-interface stuff is
moved to the main handling code now to do it on the fly - sigh */
static int
verifySettings(void)
{
if (!hostname[0])
feepout("Must specify a host name of some sort!");
else if (gateway[0] && strcmp(gateway, "NO") && !verifyIP(gateway))
feepout("Invalid gateway IP address specified");
else if (nameserver[0] && !verifyIP(nameserver))
feepout("Invalid name server IP address specified");
else if (netmask[0] && (netmask[0] < '0' && netmask[0] > '3'))
feepout("Invalid netmask value");
else if (ipaddr[0] && !verifyIP(ipaddr))
feepout("Invalid IP address");
else
return 1;
return 0;
}
static void
dhcpGetInfo(Device *devp)
{
/* If it fails, do it the old-fashioned way */
if (dhcpParseLeases("/var/db/dhclient.leases", hostname, domainname,
nameserver, ipaddr, gateway, netmask) == -1) {
FILE *ifp;
char *cp, cmd[256], data[2048];
int i, j;
/* Bah, now we have to kludge getting the information from ifconfig */
snprintf(cmd, sizeof cmd, "ifconfig %s", devp->name);
ifp = popen(cmd, "r");
if (ifp) {
j = fread(data, 1, sizeof(data), ifp);
fclose(ifp);
if (j < 0) /* paranoia */
j = 0;
data[j] = '\0';
if (isDebug())
msgDebug("DHCP configured interface returns %s\n", data);
/* XXX This is gross as it assumes a certain ordering to
ifconfig's output! XXX */
if ((cp = strstr(data, "inet")) != NULL) {
i = 0;
cp += 5; /* move over keyword */
while (*cp != ' ')
ipaddr[i++] = *(cp++);
ipaddr[i] = '\0';
if (!strncmp(++cp, "netmask", 7)) {
i = 0;
cp += 8;
while (*cp != ' ')
netmask[i++] = *(cp++);
netmask[i] = '\0';
}
}
}
}
/* If we didn't get a name server value, hunt for it in resolv.conf */
if (!nameserver[0] && file_readable("/etc/resolv.conf"))
configEnvironmentResolv("/etc/resolv.conf");
if (hostname[0])
variable_set2(VAR_HOSTNAME, hostname, 0);
}
/* This is it - how to get TCP setup values */
int
tcpOpenDialog(Device *devp)
{
WINDOW *ds_win, *save = NULL;
ComposeObj *obj = NULL;
int n = 0, filled = 0, cancel = FALSE;
int max, ret = DITEM_SUCCESS;
int use_dhcp = FALSE;
char *tmp;
char title[80];
/* Initialise vars from previous device values */
if (devp->private) {
DevInfo *di = (DevInfo *)devp->private;
SAFE_STRCPY(ipaddr, di->ipaddr);
SAFE_STRCPY(netmask, di->netmask);
SAFE_STRCPY(extras, di->extras);
use_dhcp = di->use_dhcp;
}
else { /* See if there are any defaults */
char *cp;
/* First try a DHCP scan if such behavior is desired */
if (!variable_cmp(VAR_TRY_DHCP, "YES") || !msgYesNo("Do you want to try DHCP configuration of the interface?")) {
int k;
Mkdir("/var/db");
Mkdir("/var/run");
Mkdir("/tmp");
msgNotify("Scanning for DHCP servers...");
if (0 == vsystem("dhclient -1 %s", devp->name)) {
dhcpGetInfo(devp);
use_dhcp = TRUE;
}
else
use_dhcp = FALSE;
}
/* Special hack so it doesn't show up oddly in the tcpip setup menu */
if (!strcmp(gateway, "NO"))
gateway[0] = '\0';
/* Get old IP address from variable space, if available */
if (!ipaddr[0]) {
if ((cp = variable_get(VAR_IPADDR)) != NULL)
SAFE_STRCPY(ipaddr, cp);
else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_IPADDR))) != NULL)
SAFE_STRCPY(ipaddr, cp);
}
/* Get old netmask from variable space, if available */
if (!netmask[0]) {
if ((cp = variable_get(VAR_NETMASK)) != NULL)
SAFE_STRCPY(netmask, cp);
else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_NETMASK))) != NULL)
SAFE_STRCPY(netmask, cp);
}
/* Get old extras string from variable space, if available */
if (!extras[0]) {
if ((cp = variable_get(VAR_EXTRAS)) != NULL)
SAFE_STRCPY(extras, cp);
else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_EXTRAS))) != NULL)
SAFE_STRCPY(extras, cp);
}
}
/* Look up values already recorded with the system, or blank the string variables ready to accept some new data */
if (!hostname[0]) {
tmp = variable_get(VAR_HOSTNAME);
if (tmp)
SAFE_STRCPY(hostname, tmp);
}
if (!domainname[0]) {
tmp = variable_get(VAR_DOMAINNAME);
if (tmp)
SAFE_STRCPY(domainname, tmp);
}
if (!gateway[0]) {
tmp = variable_get(VAR_GATEWAY);
if (tmp && strcmp(tmp, "NO"))
SAFE_STRCPY(gateway, tmp);
}
if (!nameserver[0]) {
tmp = variable_get(VAR_NAMESERVER);
if (tmp)
SAFE_STRCPY(nameserver, tmp);
}
save = savescr();
/* If non-interactive, jump straight over the dialog crap and into config section */
if (variable_get(VAR_NONINTERACTIVE) &&
!variable_get(VAR_NETINTERACTIVE)) {
if (!hostname[0])
msgConfirm("WARNING: hostname variable not set and is a non-optional\n"
"parameter. Please add this to your installation script\n"
"or set the netInteractive variable (see sysinstall man page)");
else
goto netconfig;
}
/* Now do all the screen I/O */
dialog_clear_norefresh();
/* We need a curses window */
if (!(ds_win = openLayoutDialog(TCP_HELPFILE, " Network Configuration ",
TCP_DIALOG_X, TCP_DIALOG_Y, TCP_DIALOG_WIDTH, TCP_DIALOG_HEIGHT))) {
beep();
msgConfirm("Cannot open TCP/IP dialog window!!");
restorescr(save);
return DITEM_FAILURE;
}
/* Draw interface configuration box */
draw_box(ds_win, TCP_DIALOG_Y + 9, TCP_DIALOG_X + 8, TCP_DIALOG_HEIGHT - 13, TCP_DIALOG_WIDTH - 17,
dialog_attr, border_attr);
wattrset(ds_win, dialog_attr);
sprintf(title, " Configuration for Interface %s ", devp->name);
mvwaddstr(ds_win, TCP_DIALOG_Y + 9, TCP_DIALOG_X + 14, title);
/* Some more initialisation before we go into the main input loop */
obj = initLayoutDialog(ds_win, layout, TCP_DIALOG_X, TCP_DIALOG_Y, &max);
reenter:
cancelbutton = okbutton = 0;
while (layoutDialogLoop(ds_win, layout, &obj, &n, max, &cancelbutton, &cancel)) {
/* Prevent this from being irritating if user really means NO */
if (filled < 3) {
/* Insert a default value for the netmask, 0xffffff00 is
* the most appropriate one (entire class C, or subnetted
* class A/B network).
*/
if (!netmask[0]) {
strcpy(netmask, "255.255.255.0");
RefreshStringObj(layout[LAYOUT_NETMASK].obj);
++filled;
}
if (!index(hostname, '.') && domainname[0]) {
strcat(hostname, ".");
strcat(hostname, domainname);
RefreshStringObj(layout[LAYOUT_HOSTNAME].obj);
++filled;
}
else if (((tmp = index(hostname, '.')) != NULL) && !domainname[0]) {
SAFE_STRCPY(domainname, tmp + 1);
RefreshStringObj(layout[LAYOUT_DOMAINNAME].obj);
++filled;
}
}
}
if (!cancel && !verifySettings())
goto reenter;
/* Clear this crap off the screen */
delwin(ds_win);
dialog_clear_norefresh();
use_helpfile(NULL);
/* We actually need to inform the rest of sysinstall about this
data now if the user hasn't selected cancel. Save the stuff
out to the environment via the variable_set() mechanism */
netconfig:
if (!cancel) {
DevInfo *di;
char temp[512], ifn[255];
char *ifaces;
if (hostname[0]) {
variable_set2(VAR_HOSTNAME, hostname, use_dhcp ? 0 : 1);
sethostname(hostname, strlen(hostname));
}
if (domainname[0])
variable_set2(VAR_DOMAINNAME, domainname, 0);
if (gateway[0])
variable_set2(VAR_GATEWAY, gateway, use_dhcp ? 0 : 1);
if (nameserver[0])
variable_set2(VAR_NAMESERVER, nameserver, 0);
if (ipaddr[0])
variable_set2(VAR_IPADDR, ipaddr, 0);
if (!devp->private)
devp->private = (DevInfo *)safe_malloc(sizeof(DevInfo));
di = devp->private;
SAFE_STRCPY(di->ipaddr, ipaddr);
SAFE_STRCPY(di->netmask, netmask);
SAFE_STRCPY(di->extras, extras);
di->use_dhcp = use_dhcp;
sprintf(ifn, "%s%s", VAR_IFCONFIG, devp->name);
if (use_dhcp)
sprintf(temp, "DHCP");
else
sprintf(temp, "inet %s %s netmask %s", ipaddr, extras, netmask);
variable_set2(ifn, temp, 1);
ifaces = variable_get(VAR_INTERFACES);
if (!ifaces)
variable_set2(VAR_INTERFACES, ifaces = "lo0", 1);
/* Only add it if it's not there already */
if (!strstr(ifaces, devp->name)) {
sprintf(ifn, "%s %s", devp->name, ifaces);
variable_set2(VAR_INTERFACES, ifn, 1);
}
if (!use_dhcp)
configResolv(NULL); /* XXX this will do it on the MFS copy XXX */
ret = DITEM_SUCCESS;
}
else
ret = DITEM_FAILURE;
restorescr(save);
return ret;
}
static Device *NetDev;
static int
netHook(dialogMenuItem *self)
{
Device **devs;
devs = deviceFindDescr(self->prompt, self->title, DEVICE_TYPE_NETWORK);
if (devs) {
if (DITEM_STATUS(tcpOpenDialog(devs[0])) != DITEM_FAILURE)
NetDev = devs[0];
else
NetDev = NULL;
}
return devs ? DITEM_LEAVE_MENU : DITEM_FAILURE;
}
/* Get a network device */
Device *
tcpDeviceSelect(void)
{
DMenu *menu;
Device **devs, *rval;
int cnt;
devs = deviceFind(NULL, DEVICE_TYPE_NETWORK);
cnt = deviceCount(devs);
rval = NULL;
if (!cnt) {
msgConfirm("No network devices available!");
return NULL;
}
else if (!RunningAsInit) {
if (!msgYesNo("Running multi-user, assume that the network is already configured?"))
return devs[0];
}
if (cnt == 1) {
if (DITEM_STATUS(tcpOpenDialog(devs[0]) == DITEM_SUCCESS))
rval = devs[0];
}
else if (variable_get(VAR_NONINTERACTIVE) && variable_get(VAR_NETWORK_DEVICE)) {
devs = deviceFind(variable_get(VAR_NETWORK_DEVICE), DEVICE_TYPE_NETWORK);
cnt = deviceCount(devs);
if (cnt) {
if (DITEM_STATUS(tcpOpenDialog(devs[0]) == DITEM_SUCCESS))
rval = devs[0];
}
}
else {
int status;
menu = deviceCreateMenu(&MenuNetworkDevice, DEVICE_TYPE_NETWORK, netHook, NULL);
if (!menu)
msgFatal("Unable to create network device menu! Argh!");
status = dmenuOpenSimple(menu, FALSE);
free(menu);
if (status)
rval = NetDev;
}
return rval;
}
/* Do it from a menu that doesn't care about status */
int
tcpMenuSelect(dialogMenuItem *self)
{
Device *tmp;
tmp = tcpDeviceSelect();
if (tmp && !((DevInfo *)tmp->private)->use_dhcp && !msgYesNo("Would you like to bring the %s interface up right now?", tmp->name))
if (!tmp->init(tmp))
msgConfirm("Initialization of %s device failed.", tmp->name);
return DITEM_SUCCESS | DITEM_RESTORE;
}
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